Christmas trees, they can be found in the capital of Pyongyang , especially in upscale shops and restaurants , but are largely stripped of religious symbols. Authorities clamped down on all Christian activities in the country by the early 1950s. Christians can be arrested for celebrating Christmas. It’s estimated that between 50,000 and 70,000 Christians are locked up in prisons simply for their faith. about 100,000 Christians practice in secret churches across the nation now. “When we met in bigger groups, we went far away to the mountains where no one could find us,” a leader of a Christian group disclosed to the media.